Method for Re-Selecting Cell by User Equipment and User Equipment Using Same

1. A method for reselecting a cell, the method performed by a user equipment and comprising: receiving a threshold and a normal frequency priority for cell reselection; selecting a random number within a specific range; comparing the selected random number with the received threshold; determining whether a condition in which a priority according to the normal frequency priority is adjusted is satisfied with respect to a specific frequency; adjusting the priority for the specific frequency if the condition is satisfied; and performing the cell reselection based on the adjusted priority.

2. The method of claim 1 , further comprising receiving a priority adjustment value, wherein the priority for the specific frequency is adjusted according to the priority adjustment value if the condition is satisfied.

3. The method of claim 2 , wherein the priority adjustment value is a predetermined value or is received from a network.

4. The method of claim 1 , further comprising receiving a priority adjustment value, wherein the priority is adjusted according to a product of the priority adjustment value and the selected random number if the condition is satisfied.

5. The method of claim 4 , wherein the condition is satisfied if both the threshold and the priority adjustment value are received.

6. A user equipment (UE) performing cell reselection, the UE comprising: a radio frequency (RF) unit transmitting and receiving radio signals; and a processor connected to the RF unit, wherein the processor is configured to: control the RF unit to receive a threshold and a normal frequency priority for cell reselection; select a random number within a specific range; compare the selected random number with the received threshold; determine whether a condition in which a priority according to the normal frequency priority is adjusted is satisfied with respect to a specific frequency; adjust the priority for the specific frequency if the condition is satisfied; and perform the cell reselection based on the adjusted priority.

7. The apparatus of claim 6 , wherein: the processor is further configured to control the RF unit to receive a priority adjustment value; and the priority for the specific frequency is adjusted according to the priority adjustment value if the condition is satisfied.

8. The apparatus of claim 7 , wherein the priority adjustment value is a predetermined value or is received from a network.

9. The apparatus of claim 6 , wherein: the processor is further configured to control the RF unit to receive a priority adjustment value; and the priority is adjusted according to a product of the priority adjustment value and the selected random number if the condition is satisfied.

10. The apparatus of claim 9 , wherein the condition is satisfied if both the threshold and the priority adjustment value are received.